Industry water, effects, environmental, pollutants

Sewage treatment

Sewage treatment is the process of removing contaminants from municipal wastewater, containing mainly household sewage plus some industrial wastewater.Physical, chemical, and biological processes are used to remove contaminants and produce treated wastewater (or treated effluent) that is safe enough for release into the environment.A by product of sewage treatment is a semi solid waste or

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Glossary of Mining Terms Kentucky Coal Education

A. Abutment In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ahead of the face and the back abutment, that is, the settled packs behind the face.

Tertiary sector of the economy

The tertiary sector or service sector is the third of the three economic sectors of the three sector theory.The others are the secondary sector (approximately the same as manufacturing), and the primary sector (raw materials).. The service sector consists of the production of services instead of end products.Services (also known as "intangible goods") include attention, advice, access